The phrase 'which less than' is grammatically correct and can be used in written English
This phrase is typically used to indicate a comparison between two values. For example, "The cost of this product is $50, which is less than the cost of its competitor."
Austria makes about 2.5 million hectoliters, of which less than 10percentt is premium quality.
Our turnover is in excess of £800m, of which less than 20% is now grant from the public purse.
In the fiscal year that just ended, 7.3 million passports were issued, of which less than 20percentt were renewals.
The World Bank cites estimates of 2m guns in the country, of which less than 10% are legally registered.
Between 2010 and 2015, there were three hundred thousand police stops, of which less than four per cent resulted in a citation or arrest.
But as of yesterday, only 783 people had filed even partial claims, of which less than 200 had been deemed "substantially complete" by Mr. Feinberg's office.
GROZNY, Russia — In the evenings, unexpected sights appear in this city, which less than two years ago seemed beyond saving and repair.
It is a remarkable turnabout for Fortress, which less than two years ago was soaring along with the rest of Wall Street.
A movement which less than five years ago was dismissed as an irritant and an irrelevance has precipitated the largest political shock Britain has seen in modern history.
"We are very disappointed that the NUT and NASUWT have decided to take strike action, which less than a quarter of teachers actually voted for," she said.
That leaves an electorate of just 24 million, of which less than half votes, compared to around two-thirds of whites and African Americans.
